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Bethe logarithms for the 1 singlet S, 2 singlet S and 2 triplet S states of helium and helium-like ions | | Jonathan D. Baker
; Robert C. Forrey
; Malgorzata Jeziorska
; John D. Morgan III
; | | Date: |
3 Feb 2000 | | Subject: | Atomic Physics | physics.atom-ph | | Affiliation: | NIST), Robert C. Forrey (Penn State University), Malgorzata Jeziorska (University of Warsaw) and John D. Morgan III (University of Delaware | | Abstract: | We have computed the Bethe logarithms for the 1 singlet S, 2 singlet S and 2 triplet S states of the helium atom to about seven figure-accuracy using a generalization of a method first developed by Charles Schwartz. We have also calculated the Bethe logarithms for the helium-like ions of Li, Be, O and S for all three states to study the 1/Z behavior of the results. The Bethe logarithm of H minus was also calculated with somewhat less accuracy. The use of our Bethe logarithms for the excited states of neutral helium, instead of those from Goldman and Drake’s first-order 1/Z-expansion, reduces by several orders of magnitude the discrepancies between the theoretically calculated and experimentally measured ionization potentials of these states. | | Source: | arXiv, physics/0002005 | | Services: | Forum | Review | PDF | Favorites | |
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